Osisko Recognized for Strong Sustainability Performance

• Press Release
• Source: Osisko Mining Corporation
• On 12:58 pm EST, Thursday December 4, 2008

MONTREAL, QUEBEC--(MARKET WIRE)--Dec 4, 2008 -- Osisko Mining Corporation ("Osisko") (OSK: TSX)(Frankfurt:EWX.F - News) is pleased to report that it has recently been granted two awards recognizing the positive impacts of the Canadian Malartic Project.

AEMQ 2008 e3 Award

The Association de l'exploration miniere du Quebec ("AEMQ") presented Osisko with the e3 Award (environmental excellence in exploration) which recognizes the Corporation's high level of environmental and social responsibilities as well as its conformity to the e3 best practices developed for exploration activities by the Prospectors and Developers Association of Canada ("PDAC").

The AEMQ recognized Osisko for its efforts in mitigating the impact of the Canadian Malartic Project on the surrounding population, its implication in community development as an important partner to the citizens of Malartic, and the creation of the Fonds Essor Malartic Osisko to financially support local initiatives that will improve the quality of life of the residents of Malartic. In accepting this award, Osisko acknowledges the efforts and commitment of Cygnus Consulting Inc. of Montreal, who have been managing and executing the Canadian Malartic exploration program on behalf of Osisko since 2005.

2008 Chamber of Commerce Rouyn-Noranda Extra Award

At its recent Annual Awards Banquet, the Chamber of Commerce of Rouyn-Noranda presented Osisko with its 2008 Extra Award for the economic impact of the Canadian Malartic Project in the Abitibi-Temiscamingue region.

Sean Roosen, President and CEO, commented: "We are extremely proud of these awards which recognize our positive approach to sustainability, and in particular to the residents of Malartic and surrounding communities. Osisko continues to ensure that Malartic and the Abitibi-Temiscamingue region gain significant benefits from the development of the world class Canadian Malartic Project. We share these awards with the residents and Town Council of Malartic".

About Osisko

Osisko Mining Corporation is currently evaluating the Canadian Malartic gold deposit and adjacent areas for a large-scale open pit, bulk-tonnage mining operation. The Company is well-funded with approximately $120 million on hand and is carrying out an aggressive definition drilling and exploration campaign on the Canadian Malartic deposit and surrounding properties.

     Contacts:
     Osisko Mining Corporation
     John Burzynski
     Vice-President Corporate Development
     514-735-7131
     http://www.osisko.com
      
     Osisko Mining Corporation
     Daniel Boase
     Investor Relations
     416-742-5600
     Toll Free: 1-866-580-8891